aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/usb/core/hub.c
diff options
context:
space:
mode:
authorJohn Youn <John.Youn@synopsys.com>2001-09-17 00:00:00 -0700
committerSarah Sharp <sarah.a.sharp@linux.intel.com>2011-03-13 18:07:11 -0700
commitdbe79bbe9dcb22cb3651c46f18943477141ca452 (patch)
tree86e2dd608fd6ae7902b4abfdfbcf1969980386e3 /drivers/usb/core/hub.c
parentad73dff32e04cad1ff2af89512bf489224b503cc (diff)
USB 3.0 Hub Changes
Update the USB core to deal with USB 3.0 hubs. These hubs have a slightly different hub descriptor than USB 2.0 hubs, with a fixed (rather than variable length) size. Change the USB core's hub descriptor to have a union for the last fields that differ. Change the host controller drivers that access those last fields (DeviceRemovable and PortPowerCtrlMask) to use the union. Translate the new version of the hub port status field into the old version that khubd understands. (Note: we need to fix it to translate the roothub's port status once we stop converting it to USB 2.0 hub status internally.) Add new code to handle link state change status. Send out new control messages that are needed for USB 3.0 hubs, like Set Hub Depth. This patch is a modified version of the original patch submitted by John Youn. It's updated to reflect the removal of the "bitmap" #define, and change the hub descriptor accesses of a couple new host controller drivers. Signed-off-by: John Youn <johnyoun@synopsys.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> Cc: Tony Olech <tony.olech@elandigitalsystems.com> Cc: "Robert P. J. Day" <rpjday@crashcourse.ca> Cc: Max Vozeler <mvz@vozeler.com> Cc: Tejun Heo <tj@kernel.org> Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Cc: Rodolfo Giometti <giometti@linux.it> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Anton Vorontsov <avorontsov@mvista.com> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Lothar Wassmann <LW@KARO-electronics.de> Cc: Olav Kongas <ok@artecdesign.ee> Cc: Martin Fuzzey <mfuzzey@gmail.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: David Brownell <dbrownell@users.sourceforge.net>
Diffstat (limited to 'drivers/usb/core/hub.c')
-rw-r--r--drivers/usb/core/hub.c73
1 files changed, 65 insertions, 8 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index b574f9131b4..feb6e596c7c 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -82,6 +82,10 @@ struct usb_hub {
void **port_owners;
};
+static inline int hub_is_superspeed(struct usb_device *hdev)
+{
+ return (hdev->descriptor.bDeviceProtocol == 3);
+}
/* Protect struct usb_device->state and ->children members
* Note: Both are also protected by ->dev.sem, except that ->state can
@@ -172,14 +176,23 @@ static struct usb_hub *hdev_to_hub(struct usb_device *hdev)
}
/* USB 2.0 spec Section 11.24.4.5 */
-static int get_hub_descriptor(struct usb_device *hdev, void *data, int size)
+static int get_hub_descriptor(struct usb_device *hdev, void *data)
{
- int i, ret;
+ int i, ret, size;
+ unsigned dtype;
+
+ if (hub_is_superspeed(hdev)) {
+ dtype = USB_DT_SS_HUB;
+ size = USB_DT_SS_HUB_SIZE;
+ } else {
+ dtype = USB_DT_HUB;
+ size = sizeof(struct usb_hub_descriptor);
+ }
for (i = 0; i < 3; i++) {
ret = usb_control_msg(hdev, usb_rcvctrlpipe(hdev, 0),
USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
- USB_DT_HUB << 8, 0, data, size,
+ dtype << 8, 0, data, size,
USB_CTRL_GET_TIMEOUT);
if (ret >= (USB_DT_HUB_NONVAR_SIZE + 2))
return ret;
@@ -365,6 +378,19 @@ static int hub_port_status(struct usb_hub *hub, int port1,
} else {
*status = le16_to_cpu(hub->status->port.wPortStatus);
*change = le16_to_cpu(hub->status->port.wPortChange);
+
+ if ((hub->hdev->parent != NULL) &&
+ hub_is_superspeed(hub->hdev)) {
+ /* Translate the USB 3 port status */
+ u16 tmp = *status & USB_SS_PORT_STAT_MASK;
+ if (*status & USB_SS_PORT_STAT_POWER)
+ tmp |= USB_PORT_STAT_POWER;
+ if ((*status & USB_SS_PORT_STAT_SPEED) ==
+ USB_PORT_STAT_SPEED_5GBPS)
+ tmp |= USB_PORT_STAT_SUPER_SPEED;
+ *status = tmp;
+ }
+
ret = 0;
}
mutex_unlock(&hub->status_mutex);
@@ -607,7 +633,7 @@ static int hub_port_disable(struct usb_hub *hub, int port1, int set_state)
if (hdev->children[port1-1] && set_state)
usb_set_device_state(hdev->children[port1-1],
USB_STATE_NOTATTACHED);
- if (!hub->error)
+ if (!hub->error && !hub_is_superspeed(hub->hdev))
ret = clear_port_feature(hdev, port1, USB_PORT_FEAT_ENABLE);
if (ret)
dev_err(hub->intfdev, "cannot disable port %d (err = %d)\n",
@@ -795,6 +821,11 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
clear_port_feature(hub->hdev, port1,
USB_PORT_FEAT_C_ENABLE);
}
+ if (portchange & USB_PORT_STAT_C_LINK_STATE) {
+ need_debounce_delay = true;
+ clear_port_feature(hub->hdev, port1,
+ USB_PORT_FEAT_C_PORT_LINK_STATE);
+ }
/* We can forget about a "removed" device when there's a
* physical disconnect or the connect status changes.
@@ -964,12 +995,23 @@ static int hub_configure(struct usb_hub *hub,
goto fail;
}
+ if (hub_is_superspeed(hdev) && (hdev->parent != NULL)) {
+ ret = usb_control_msg(hdev, usb_sndctrlpipe(hdev, 0),
+ HUB_SET_DEPTH, USB_RT_HUB,
+ hdev->level - 1, 0, NULL, 0,
+ USB_CTRL_SET_TIMEOUT);
+
+ if (ret < 0) {
+ message = "can't set hub depth";
+ goto fail;
+ }
+ }
+
/* Request the entire hub descriptor.
* hub->descriptor can handle USB_MAXCHILDREN ports,
* but the hub can/will return fewer bytes here.
*/
- ret = get_hub_descriptor(hdev, hub->descriptor,
- sizeof(*hub->descriptor));
+ ret = get_hub_descriptor(hdev, hub->descriptor);
if (ret < 0) {
message = "can't read hub descriptor";
goto fail;
@@ -991,12 +1033,14 @@ static int hub_configure(struct usb_hub *hub,
wHubCharacteristics = le16_to_cpu(hub->descriptor->wHubCharacteristics);
- if (wHubCharacteristics & HUB_CHAR_COMPOUND) {
+ /* FIXME for USB 3.0, skip for now */
+ if ((wHubCharacteristics & HUB_CHAR_COMPOUND) &&
+ !(hub_is_superspeed(hdev))) {
int i;
char portstr [USB_MAXCHILDREN + 1];
for (i = 0; i < hdev->maxchild; i++)
- portstr[i] = hub->descriptor->DeviceRemovable
+ portstr[i] = hub->descriptor->u.hs.DeviceRemovable
[((i + 1) / 8)] & (1 << ((i + 1) % 8))
? 'F' : 'R';
portstr[hdev->maxchild] = 0;
@@ -2029,6 +2073,8 @@ static int hub_port_wait_reset(struct usb_hub *hub, int port1,
udev->speed = USB_SPEED_HIGH;
else if (portstatus & USB_PORT_STAT_LOW_SPEED)
udev->speed = USB_SPEED_LOW;
+ else if (portstatus & USB_PORT_STAT_SUPER_SPEED)
+ udev->speed = USB_SPEED_SUPER;
else
udev->speed = USB_SPEED_FULL;
return 0;
@@ -3430,6 +3476,17 @@ static void hub_events(void)
clear_port_feature(hdev, i,
USB_PORT_FEAT_C_RESET);
}
+ if (portchange & USB_PORT_STAT_C_LINK_STATE) {
+ clear_port_feature(hub->hdev, i,
+ USB_PORT_FEAT_C_PORT_LINK_STATE);
+ }
+ if (portchange & USB_PORT_STAT_C_CONFIG_ERROR) {
+ dev_warn(hub_dev,
+ "config error on port %d\n",
+ i);
+ clear_port_feature(hub->hdev, i,
+ USB_PORT_FEAT_C_PORT_CONFIG_ERROR);
+ }
if (connect_change)
hub_port_connect_change(hub, i,